MAX24188ETK2

Overview

The MAX24188ETK2 is a low-cost IEEE 1588 clock IC designed to serve as the central time base in multiport systems. It provides hardware support for Ordinary, Boundary, and Transparent Clocks, steered by software to follow an external master. The device features three time/frequency controls: Direct Time Write, Time Adjustment, and High-Resolution Frequency Adjustment. It operates from a supply voltage of 1.14V to 3.465V with a maximum frequency of 125MHz. Packaged in a 68-TQFN (8x8) exposed pad, it supports -40°C to +85°C operating temperatures.

Feature Summary

• Complete hardware support for IEEE 1588 architectures including Ordinary, Boundary, and Transparent Clocks
• Three time/frequency controls: Direct Time Write, Time Adjustment, and High-Resolution Frequency Adjustment
• Programmable Event Generator (PEG) capable of outputting 1PPS or various clock signals
• Input Event Timestamper detects incoming time alignment or clock edges with 1ns accuracy

Applications

• Central time-clock for 1588-enabled equipment with timestamping on multiple ports
• Wireless base stations and controllers
• Switches, routers, DSLAMs, and PON equipment
• Pseudowire circuit emulation equipment
• Test and measurement systems

Procurement Notes

Verify the specific suffix 'ETK2' against official Microchip documentation, as standard listings often reference 'ETK+'. Confirm package availability and lead times directly with authorized distributors. Ensure compliance with RoHS standards if required by the application environment.

Selection Notes

Select this component for applications requiring a centralized 1588 time reference. It supports input clocks of 10MHz, 12.8MHz, 25MHz, or 125MHz. The device requires 1.2V core voltage with 3.3V I/O levels. Consider the 68-TQFN package constraints for PCB layout and thermal management.

Part Context

The MAX24188 is part of Maxim Integrated's (now Microchip) portfolio of clock synchronization solutions. It is often used in conjunction with other interface ICs like the MAX24288 or DS31400 to build complete Ethernet switching or router platforms that require precise time synchronization across multiple ports.

Replacement Considerations

Check for direct pin-compatible replacements within the MAX24188 family. Verify if newer revisions have updated errata or feature sets. Cross-reference with similar IEEE 1588 clock generators from other manufacturers if supply chain constraints exist.